Sectional grate



Patented I July i,' '1930 MERLE Newman; or'MInLAnJaIMIoH IGAn sEoTIonAn eR 'rE Application filed October s, rm?- Serial No. 312,812.,

This invention relates to stoker grates, and particularly to a sectional grate made up of a V plurality of individual bars.

The prime object of the invention. is to provide a nonsifting grate, which will. prevent fine ash and fuel dropping into the air chamber, and thereby eliminate the possibilityof burning out the extension grates, due to the I ignition of an accumulation of siftingsof tional view taken on the line 66 ofiFig. 1,

fine ash and fuel therein. V

Another ob ect is to design a sectlonal grate by insuring an even and maximum volume of a air being led to the fuel bed at all times.

A further object isto provide a grate having a, smooth upper surface, so that clinker adhesion is reduced to a minimum, which is so ribbed as to dissipate heat, as well as rigidly M reinforce the structure,'and which is so shaped and mounted as to, permit it to expand' or-- n The'front end of the bar'is angled as shown grow withoutbinding or'warping.

The above and other: objects will appear as' the specification progresses reference being had to the accompanying drawing in which n I have shown the preferred embodiment of my invention, andiin which like reference parts throughout the numerals indicate like several views thereof.

In the drawlng,

Fig. 2 is a top plan View showing several of the grate bars in assembled relation.

Fig. 3 is an end view of thegrate bar shown' in Fig. 1. Y

Fig 4 IS a Vertlcal sectlonaiendyl-ew taken fftention -to the fact that Whenthe barsare. in

assembled relation, the/passages? :and 9are I not n vertlcalallnement, but, are staggered,

on the line 4-4 of Fig.2.

7 Fig; 5 is a vertical sectional view taken on the line 5 5 of Fig. 1. i

Fig. 6 is'a fragmentary longitudinal'secf thearrows indicate the direction of flow of the air. V 1

Referring now particularly to the drawing,

the numeral 5 indicates the individual grate 7 bars which are formed as clearlyfshown in Fig. 1 of the drawing, the upper surface being flat and smooth, the edge 6 overhanging the body of the 'st-ructure,.,and is provided with spaced apart Vertically disposed: pas- F 1g. 1 1s aside View of one of the gratebars; e; 1 11 1 d r 10 as e r y shown F g 2 [each passage opening into vthe 'nall'y disposed passage 18.1

sages' Y therein, the opposite side being formed with spaced apart laterally projecting raised above thetop of the ribs.

The back end of the bar is rounded over and projects downwardly at an angle, the lower ,end being notched as shown at 11, and is adapted to engage one leg of an" obtuse angle" sectionf1 2 which forms the upper edge of the so constructed that the air passages will not become clogged with ash and clinkers, thereair chamber not shown, and I'wi'sh to direct particular attention tothe fact that the front edgeof the notch 11' is angled,so that as-the riding up on the member 12, and compensatany expansion. a rib or fin 13 belng cast m the "front "end of the bar.

14, the end resting on the 'stoker wall not shown, a lug 15 being'cast on the bottom there-- [.Of, a transversely disposed cored opening" blfiis provided therethrough, and isadapted .to receive a rod 17 for anchoring and rigidly ,5, securing the front ends of the bars together.

1 iTh e bars. when assembled, are placed; side by side theback end ofthelip 6 resting on and 6,jthei lip 6 overhanging the ribs 8, and

.beingvertically spaced therefromto provide a-'- longitudinally disposed passage 18 therebetween, andI' wish todirect particular .at-

longitudi- The air. chamber is of course locatedbepassage 9 thence along the passage 18'and to the fuel'through the passage 7, this forms a tortuous passage, making it impossible for fine. coal or ashes to sift through the grate bars and into the air ,chamber this also insures a maximum Volumeof' air without velocity, and the fins which are exposed-Q,

"grate bars expand or grow this back endof the bar will rise accordingly the anglededge itegral'with each'bar structure, leading for 0 ardly and terminating at, a point spaced "neath the grate, andyair flows throughthe Y to the air chamber, effectively dissipate the heat as Well as reinforcing the grate bars.

From the foregoing description it will be i V obvious that I have perfected avery efficient, 5 substantial, and economical sectional grate for stokers. WhaaLclairnQis: 1.3A lsectional Qgl'flte' i-lcomp' ing'zia "plurality of bars placed side by side each'bar being formed with an overhanging lip having a plurality of -spacd apa'r-t' passages therein, laterally projecting ribs on the 0pposite side of each bar and providd vvith passages therebetween theupassageslbetween 15 said ribs of the bar being'in staggered felaition to-itheapassagesini thelili-p of thegadja' 1 xeeentrl-iar. e v r 2, 5A grategbar provided -vvijth-- a ,,-p1nr.ality wofverticallyldisposed passages therein-,aplu a srality of zspaeed "apart laterally iextending ribs on theopposite, side of;the.bar,,;and a stransversely disposed bearing nn: the back of atheibarg the-iront. wall ofrsaidrbearingabeing :angled. V L

we r J A secti0nal gratescomprising ;a plural ity.ofabarsplacedsideby side,- spacedzapart laterallynprojecting ribs (011 1 one side, of'each Ihar 'a .1 lip -,on the opposite,,side and over- ,jliangingthe ribs on theadjacentbar to/form" also .a .1 longitudinally disposed passage between saidglip and; ribs, and openings in said, ribs ganrl lipsand'commnnicating withsaid lona g'itiidinjally disposed passage.

4;- iAlsectional grate comprl ing a plurality e35 of :bars placedsidabyiside, spacedzr apart' 'later'ally pivojectingribsj n,oneeside oithe bar, a lip: on the opposite: side adapted to v overhang the ribs on the adjacent bar to form. V a longitudinally 'disposedair )paSsagethere 7 4 between, vertically disposed passagesbe- 1 "tween said ribsan'd in the.overhanging;lip, I and" communicating with the longitudinally. dispOsed passages, the passagesliin the ribs being ;in* staggered relation to thegpassages' i -"inthefl-ip. V 'l '5. '1A"grate: ban-formed with" anwVeIhangv inglipfhavinga plurality of passagesfihere- (in, zthe' f ront eiid'of'the bar being angled; the 'rearendbeing-roundedwover, and-extending, a "downwardly and havingtransversely 'j'dis jecting ribs on the opposite side offthe'ibar and space'dfr'omthe top, -passages between sziidiibsg'and a fin formed' On' the 'bottom kig -ofsai'd bar. V In testimony whereo'f 'l' hereuntoafiix my signature 7 f e IPMERLENEVVKIRK;

posed bearing formed therein; 'laterilly' pro-, i 

